Question

Simplify: (5m-n)(25m2 + 5mn +n2) – (3m+2n)3

Answer 1

Answer:

125m³ - n³- 9m - 6n

Step-by-step explanation:

(5m-n)(25m2 + 5mn +n2) – (3m+2n)3

= 5m ( 25m² + 5mn+ n²) - n( 25m² + 5mn+ n²) -9m-6n

= 125m³ + 25m²n + 5mn² - 25m²n - 5mn² - n³- 9m-6n

= 125m³ - n³ - 9m - 6n

Hope, this will help you

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